by Prof. DR. Sukardjo $13.00
by DR. Ir. Hj. Tati Nurmala, S.W $6.00
by Drs. Rudy T. Erwin, S.H $9.00
by Ubaidilah Nugraha $9.00
by Freemont E. Kast $16.00
by Ackley, Gardner $13.00
by Jeffry Stephens $5.00